With better tyres you will see a huge difference.
I run pretty consistant 7.2 over 1/8th with 1.6 60ft times.
I fitted a set of drag slicks and with only 1 scary pass (My LSD centre has failed) the car launced so much better and I had a 1.2 60ft from memory, with a lot of pedalling I got through the finish with 7.0 flat.
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Cruising in 5th
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Never be afraid to do something new, Remember, Amateurs built the Ark: Professionals built the Titanic.